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CA2265720A1 - Receiver with improved multipath signal rejection - Google Patents

Receiver with improved multipath signal rejection

Info

Publication number
CA2265720A1
CA2265720A1 CA002265720A CA2265720A CA2265720A1 CA 2265720 A1 CA2265720 A1 CA 2265720A1 CA 002265720 A CA002265720 A CA 002265720A CA 2265720 A CA2265720 A CA 2265720A CA 2265720 A1 CA2265720 A1 CA 2265720A1
Authority
CA
Canada
Prior art keywords
discriminator
signal
inbound
prn code
positioning system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002265720A
Other languages
French (fr)
Other versions
CA2265720C (en
Inventor
Richard Kai-Tuen Woo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NavCorn Technology Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2265720A1 publication Critical patent/CA2265720A1/en
Application granted granted Critical
Publication of CA2265720C publication Critical patent/CA2265720C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/22—Multipath-related issues
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
    • G01S19/29—Acquisition or tracking or demodulation of signals transmitted by the system carrier including Doppler, related

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Noise Elimination (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A global positioning system receiver includes an inbound signal terminal to receive an inbound global positioning system signal having an inbound PRN code from a global positioning system signal source. A
local PRN code generator is configured to generate a local PRN code. A discriminator is coupled to the inbound signal terminal and to the local PRN code generator and configured to compare the inbound signal and the local PRN code and to generate a discriminator signal containing a positive portion and a negative portion.
A processor (1205) is coupled to the discriminator and configured to receive the discriminator signal to process the discriminator signal to determine a bit code and to determine a distance from the global positioning system signal source based on said bit code. In one embodiment the discriminator includes an acquisition mode configured to acquire the inbound PRN code wherein the discriminator has a first gate width and a tracking mode configured to track the PRN code wherein the discriminator has a second gate width less than the first gate width. Advantages of the invention include improved multipath signal rejection.
CA002265720A 1996-09-13 1997-09-10 Receiver with improved multipath signal rejection Expired - Lifetime CA2265720C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US2606396P 1996-09-13 1996-09-13
US60/026,023 1996-09-13
US08/795,608 US5808582A (en) 1996-09-13 1997-02-05 Global positioning system receiver with improved multipath signal rejection
US08/795,608 1997-02-05
PCT/US1997/015997 WO1998011451A1 (en) 1996-09-13 1997-09-10 Receiver with improved multipath signal rejection

Publications (2)

Publication Number Publication Date
CA2265720A1 true CA2265720A1 (en) 1998-03-19
CA2265720C CA2265720C (en) 2005-02-01

Family

ID=26700709

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002265720A Expired - Lifetime CA2265720C (en) 1996-09-13 1997-09-10 Receiver with improved multipath signal rejection

Country Status (7)

Country Link
US (2) US5808582A (en)
EP (1) EP0925514B1 (en)
JP (1) JP3983812B2 (en)
AR (1) AR009778A1 (en)
BR (1) BR9712042B1 (en)
CA (1) CA2265720C (en)
WO (1) WO1998011451A1 (en)

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Also Published As

Publication number Publication date
US5808582A (en) 1998-09-15
BR9712042B1 (en) 2011-09-06
EP0925514A1 (en) 1999-06-30
WO1998011451A1 (en) 1998-03-19
JP3983812B2 (en) 2007-09-26
JP2001501305A (en) 2001-01-30
EP0925514B1 (en) 2011-04-06
EP0925514A4 (en) 2001-01-31
BR9712042A (en) 2001-09-04
AR009778A1 (en) 2000-05-03
US6259401B1 (en) 2001-07-10
CA2265720C (en) 2005-02-01

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Legal Events

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EEER Examination request
MKEX Expiry

Effective date: 20170911

MKEX Expiry

Effective date: 20170911